“Here’s another note: I want to make it clear that all photos were taken from a distance, of people appearing in public, with an impressive zoom, mostly from waist height so as not to be obtrusive. Many photos were destroyed because I found them exploitative or inappropriate. I used a Nikon 990 digital camera, often with a 72mm wide angle lens. For even further distance from the subjects, the photos were originally nearly 1MB files, at 2048 by 1360 pixels, and were cropped down for detail.”
From here (kinda via malorama)